Mizzou CHEM 1100 - Polymers & Recycling (4 pages)

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Polymers & Recycling



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Polymers & Recycling

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Polymers & Recycling


Lecture number:
21
Pages:
4
Type:
Lecture Note
School:
University of Missouri
Course:
Chem 1100 - Atoms and Molecules With Lab
Edition:
1
Unformatted text preview:

Chem 1100 Lecture 21 Outline of Last Lecture I Plastics Polymers II Common Plastics III Polymerization IV HDPE vs LDPE V Addition Polymers VI Intermolecular Forces Outline of Current Lecture I Condensation Polymers II Polyamides III Starch Vs Cellulose IV Starting Materials for Plastics V Paper Vs Plastic VI Biodegradation Current Lecture I Condensation Polymers a You have your monomer and the first thing you want to do is erase one of the double bonds Then you draw two long bonds going out on either side and draw a line through that and draw an N on the outside and that shows the repeat units b Some atoms from the monomer are removed in polymerization H2O HCl c Example PETE PET d Copolymer two or more monomer types These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute II e Polyamides a Amino acid polymers b Form peptides and proteins c Addition polymer releases water d Synthetic imitating nature e III IV Starch Vs Cellulose a Glucose Polymer b 6 member ring 5 are carbons and 1 is oxygen each carbon ahas an OH bonded to it plus an H c Now when starch and cellulose are formed from glucose they are condensation polymers This process is enzymatic Normally two alcohols don t react with each other But the OH grabs a H from another OH group and it forms a new bond and links the two glucose molecules together d Cellulose is stronger It s used to make fibers rope It makes up the cell walls in plants Starting Materials for Plastics V VI a Petroleum mostly for fuel 3 goes towards manufacturing plastics It s non renewable b Other sources requires plentiful carbon source It also requires research funding c Most plastic ends up in landfills Municipal waste 12 plastic and 31 paper d Paper is a large disposal problem e Recycling most all cities have recycling problems to make it relatively easy for you to recycle Paper Vs Plastic a Plastic is non biodegradable Recycling creates toxic emissions and uses toxic chemicals Most plastics just end up in landfills b Incineration burning hydrocarbons like plastics this produces CO2 H2O and energy This does create less volume in landfills CO2 contributes to the greenhouse effect Burning PVC HCl gas acid rain phosgene COCl2 toxic gas inks contain heavy metals c Low environmental damage but must be monitored d It can also be oxidized as an oxidation reduction process e There are certain inks that are used on plastics that contain heavy metals which are toxic and very harmful to the environment Biodegradation a Let bacteria fungi do the work i Naturally polymers degraded this way ii Enzymes can t degrade synthetic plastics iii Solution make plastics susceptible to enzyme digestion b Paper i Heavier and 6x s the space ii Fills landfills quickly iii More expensive to produce iv Slow to degrade in landfills c Reuse i Clean and repair products for reuse ii Less new material required iii Less product goes to landfill iv Less cost goes to production d Recycling i Melt it down and remold ii Less new plastic needed iii Less product goes to landfills iv Lower production cost e Reduce i Decrease production use of plastics ii Make bottles that use less plastics iii What could replace plastic iv It has to be safe cheap easy to dispose recycle f Solutions Incineration Biodegradation Reduce Reuse Recycle


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